Let’s talk percentages! Reuters explains UN IPCC’s 95% confidence of human causation of global warming: ‘It’s based on a discussion among the authors’

UN Scientists talk their way to 95%! 'Scientists use a mixture of data and “expert judgment” to decide how likely it is that climate change is man-made and rule out other factors, such as changes in the sun’s output. The IPCC draft halves the likelihood that natural factors are to blame to 5 per cent from 10, the flip side of raising the probability that climate change is man-made to 95 per cent. “It’s based on a discussion among the authors...There must be multiple lines of evidence,” said Eystein Jansen, of the Bjerknes Centre for Climate Research in Norway and one of the authors of the Stockholm draft.'